[Beignet] opencv_test_imgproc crashs when test OCL_Imgproc/HoughLines.RealImage/0

[yan.wang at linux.intel.com]

After cloned related test data, it will not crashed.
Sorry.

> Hi, All,
>   This case will crash as the following:
>   [ RUN      ] OCL_Imgproc/HoughLines.RealImage/0
> ASSERTION FAILED: defIt != bbIt->second->end() && defIt->second != NULL
>   at file /home/yanwang/beignet/backend/src/ir/value.cpp, function
> gbe::ir::LiveOutSet::RegDefSet& gbe::ir::LiveOutSet::getDefSet(const
> gbe::ir::BasicBlock*, gbe::ir::Register), line 91
>   Thanks.
>
> Yan Wang
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